Die and die set for shoe parts and the like



June 21, 1949.

F. WUNDER DIE AND DIE SET FOR SHOE PARTS AND THE LIKE 2 Sheets-Sheet 1 Filed Dec. 2, 1946 FIG.|

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FIG. 3

INVENTOR FRANZ WUNDER ATTORNEY June 21, 1949.

F. WUNDER DIE AND- DIE SET FOR SHOE PARTS AND THE LIKE 2 Shet's-Sheet 2 Filed Dec. 2, 1946 FIG. 4

1 1 moooeooo INVENTOR FRANZ WUNDER ATTORNEY- FIGS Patented June 21, 1949 DIE AND DIE SET FOR SHOE PARTS- AND THE LIKE.

Franz, Wunder, St. Louis County Mo assignor to All-Die, Inc., St. Louis, Mo., a corporation of Missouri Appl tion D cember 2, 94.6,, Serial;N 713,599

6 Claims, 1

This invention relates to cutting and perforatins di assemblies of. the. ype especially adapt t r use in perat n on mat r al for sh parts t ut; ornamental designs th rem.

It is an object. of the. invention to provide a die assembly whi h. may be w hdrawn f o h machine. in which it employed f r the p rpo e of inserting and removing; ab au to be cut a d for changin he. die proper to mm d te fo various designs with reater speed and accuracy than has been known heretotore in the art,

to manufacture.

Other objects and advantages; become apparentv as he d scription proceeds nd a r comprehensive, understanding; of the invention willbe afforded from the following detailed specificaticn when c nsidered in c j nc ion w h the accompanyin drawings, in which Figs. 1,, 2 and 3; are plan, end and front views, respectively, of a die assembly embodying the in tan in nti n,

Fla. 4. is: he n ure of an expl ded View showing separated the various. parts. of the die assembly in. plan in the; order of their positioning from top. to bottom,

Fig, 5. is in the nature of an exploded view showing separated the various parts of the die assembly in endelevation in the order of their positioning irom top to bottom, and

Fig 6 is. a detail view showing an arrangement of the cutting tubes, in the tube plate of the die.

In perforating or cutting designs in material for s oe parts two ma h nes are m s monly used, namely, punch presses and clicker die presses. The instant invention relates to die ass mblies em loyed wit the. former typ chi n wh ch a d e as embly s supported on the bolster of the punch press, for operation by the machine's hammer or press plunger. Due to the fact that a large amount of the. material operated upon in these machines is sleazy in texture, it is not possible to operate them in a manner similarto punch presses used to operate on stiff materials, such, as metals. In other words, the blank which is to be perforated cannot be pushed into the die. against a gauge plate while the punch press hammer on its upward s ok Th s, it is necess ry that. the blank must be mumnumber of' workingparts and is economica 2 placed on the. die by hand and smoothed into position before the cutting operation is effected. Accordingly, die assemblies have been. proposed which, rovide for withdrawal of the die ass mb from the punch machine into. a, position where the operator can smooth the blank onto the die, preparatory to moving the same, back intov the machine where,- the cutting, operation is efiected. Without exception, these prior art devices hav taken the form of die assemblies which are moved into and out, of; the machine for loading and unloading in trackways. fixed to the. bolster of the machine. With these devices, instant interchan a ility of. he he prop r in the assembly has. not been possible due to. the fact that the assembly must; be set up tor each die and thereafter knock-ed down when the die is changed to a dif er nt. d i n- Mcr cver, the operatio of these 91 assemblies has been unnecessarily time consuming due to their straight line motion.

in the instant invention, it; is proposed to secure a, die assembly to the punch press in a manner such that the same maybe moved into an out or the machine about a fixed point to which the the assembly is pivoted. Furthermore, it is p o osed to pr e a piv t d tube p ate moun and a pivoted stripper plate mount cooperating the ewith. b h of wh ch are eapab1e of rece vin respectively a tube plate and a stripper plate a e. nst n ly changeable to attest a. c plete change oi the die. proper. In accordance with this teaching; and in. the. pr ierred embodiment of the invention, a die; assembly is provided which comprises a rest plate- I5, a tube plate mount. tu a tube plate {1, a stripper; plate mount 18, and a stripper plate l-Q. The. rest plate I5 is arrang d to. e se ured in a position above. a bolster not sho n). of. a pu ch press and is drilled with a hole, 21 which receives, a, stud or bolt 22 about wh ch he tub p ate mount Hi and the stripper plat mount l8; are rotated.

The tube plate t6- takes the form of a plate like arm which is drilled at 23 to receive the stud 22. A tapped hole 24 is. also provided in the arm of this member to. receive a restraining stud 25 which ext nds. hrough. a portion of the str p plate mount L8,. Also, this portion of the. tube plate mount suppo ts a collared sleeve 26,: which is, securedhe etoy a. pl a ity of screws. 21- The, bifurcated extensions, of this member are shouldered o provideled es & and 29: upon which the tube plate I! rests. Extending upwardly from the ledges 28. and 2,9 are two studs or pins. 3t and pective y, h ch gage in two holes. 33 and 34 in the tube. p ate l1. to

cure the latter on the tube plate mount. Also forming a part of the tube plate mount I6, is a handle block 35 which is drilled with two holes 36 and 31 to receive a handle 38. The two holes 38 and 3! are provided and are so arranged that the handle 38 may be screwed into the block in one of three positions selected by an operator. Thus, the handle may be screwed into the end of the block, as shown, to lie in a plane with the tube plate mount; may be screwed into the block in the hole 36 from the top, or positioned in the same hole from the bottom. The block 35 also forms a stop for the tube plate mount which acts against the base plate I when the assembly is moved into cutting position.

This mount also supports two volute springs 39 and 4|, which supply a restoring force to return the stripper plate mount to its normal position after a cutting operation has been made. Two latches 42 and 43 are also fixed to the tube plate mount I6 to retain the tube plate IT in position thereon.

The tube plate I! comprises two sections 44 and 45 which are screwed together as is shown. The section 45 mounts a plurality of cutting or perforating tubes 68, which are arranged in any required design. These tubes may be round,

"square, oblong or of any other desired shape necessary to cut the required design in the material. In any case, they are each provided with a beveled edge 41 (Fig. 6) which form a cutting 52 and 53 are provided which engage respectively in holes 54 and 55 in the stripper plate I9. The latter element is latched into position onto the stripper plate mount by two latches 56 and 51.

The arm 49, which is secured to the member 48, mounts two sleeve tubes 58 and 59 that receive respectively the collared sleeve 26 and the stud 22, the former being supported on the tube plate mount I5. A hole BI is also drilled in this arm to receive the restraining stud 25.

With this arrangement of the parts, the stripper plate mount I8 is free to move vertically above the tube plate mount on the sleeve 26 and the stud 22 which fit into the tubes 58 and 59 respectively with close tolerances.

The stripper plate I9, which is latched into position on the stripper plate mount I8, has a plurality of holes 62 drilled therein corresponding in number and arrangement with the cutting tubes 46 of the tube plate IT. A fence or gauge 63 is also provided on the stripper plate I9 against which a blank is moved for accurate positionment with respect to the die proper of the assembly.

In operation the die assembly is mounted in a punch press (not shown) so that the rest plate I5 will occupy a position above and rest on the bolster of the machine. The tube plate I! and a stripper plate I9, forming the die proper of the assembly, are then secured in their respective mounts as above described. By means of the handle 38 the pivoted portions of the die assembly are withdrawn from underneath the punch press hammer and a blank, which is to be cut, is smoothed onto the stripper plate I9 in positionment against the gauge 83 thereof. The

I8 comprising a bifurcated :z:

die assembly is then moved under the press hammer by means of the handle 38 and the machine is put into operation to press the stripper plate I8, the stripper plate mount I8, and the blank itself downwardly until the tubes 46 are forced through the holes 62 in the stripper plate I9 to cut the design in the blank. The press hammer is next withdrawn, at which time the volute springs 39 and 4| restore the stripper plate mount I8 and the stripper plate I9 to their normal positions and withdraw the cutting tubes from the blank. The severed portions of the blank are, through repeated operations, forced downwardly through the tubes 46 and are released in the expanded areas 64 (Fig. 6) which communicate with the bore of the tubes. As the pivoted portions of the die assembly are then withdrawn to insert a new blank, the tube plat mount I6 moves on of the rest plate I5 and the cut portions of the blank are free to fall out of the areas 54.

As will be apparent to those skilled in the art, it will be observed that due to the pivoted movement of the die assembly, the same may be withdrawn from the punch press to a position for loading and unloading with greater speed than can be effected with straight line motion. Also, the unique arrangement of the tube plate mount and th stripper plate mount provides for the instant inter-changeability of the tube plate I! and the stripper plate I9 forming the die proper.

Various changes may be made in the details of construction, within the scope of the appended claims, without departing from the spirit of this invention. Parts of the invention may be used without the whol and improvements may be added while retaining some or all of the advantages of the invention.

What is claimed is:

1. In a die assembly of the type described, a tube plate mount and a stripper plate mount both of which are adapted to be pivoted about a fixed point, a stripper plate detachably supported on said stripper plate mount; and a tube plate similarly supported on said tube plate mount.

2. In a die assembly of the type described, a rest plate, a tube plate mount supported above and pivotably movable with respect to said rest plate, astripper plate mount resiliently supported on said tube plate mount and pivotable therewith, a detachable tube plate supported on said tube plate mount, and a stripper plate detachably supported on said stripper plate mount.

3. In combination with a die assembly having a die mount pivotably movable with respect to a punch press plunger, a die detachably supported in said die mount comprising a stripper plate, a gauge supported on said stripper plate, and a tube plate having a first section supporting a plurality of cutting tubes passable through holes in said stripper plate and secured to a second section forming a frame for said first section.

4. In a die assembly of the type described, a tube plate mount pivotably movable about a fixed member, a tube plate detachably supported in said tube plate mount, a stripper plate mount pivotable with said tube plate mount about said fixed member, a stripper plate detachably supported on said stripper plate mount, means for supporting said stripper plate mount above said tube plate mount for vertical movement with respect thereto comprising a plurality of sleeve tubes connected to said stripper plate mount, at

least one of which receives a sleeve fixed to said tube plate mount and another of which receives said fixed member, and means acting on said stripper plate mount and said tube plate mount for applying a separating force as between these members.

5. In combination with a punch press having a press plunger, a die comprising a tube plate and a stripper plate movable relatively each to the other, a die mount pivotably movable into and out of the path of said press plunger about a fixed point having means therein providing for the relative movement of said tube plate and said stripper plate.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Altvater June 2. 1931 Number 

